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Natural Selection
Question | Answer |
---|---|
The process by which organisms gradually change over time is: | EVOLUTION |
Darwin's first observations of natural selection involved: | finches (birds) |
Only members of the same ____ can mate with one another. | species |
A ____ includes all members of the same species in an area at the same time. | population |
Differences in traits in a population is called genetic ___. | variation |
______ are traits that help an organism survive in its environment. | Adaptations. |
When humans interfere and breed plants/animals for certain traits, that is called _____ ______. | artificial selection |
___________ is the competition where organisms either survive (win) or die (lose). | Natural selection |
In order for natural selection to occur, there must be (4 things): | overpopulation, genetic variation, adaptation, selection |
When all members of a species have died, they have gone ___. | extinct |
Name two possible causes of extinction. | change in environment (loss of habitat/food) and increased competition for resources |